Coupling for steel piling



Nov.` 23 1926.

R. DAvls COUPLING FOR STEEL FILING .Filed Sept. 1

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A INVENTQR l Fel/ben Da 1//5 M ATTORNEY Patented Nov. 23, 1926.

unir-En sTATss REUBEN Davis, or ROCHELLE, New YORK.

GOUPLING non srnnL FILING.

Application filed September rl`his invention relates to hollow piling and particularly to couplings for joining sectionsof steel or other metallic piling.

Fig. l is a longitudinal section through a pair of pipe pile sections showing my improved coupling in place;

ig. 2 is a plan view of the coupling shown in Fig. l;

Fig. 3 is an enlarged detail section on line 3-3 of Fig. 2;

Fig. 4 is a view on a reduced scale illustrating the use of the coupling.

The coupling, indicated as a whole at 1, Fig. 4, is in the form of a ring or sleeve with a transverse iange 2, the inner part being formed of axially extending sleeve portions?) and 4 above and below the flange 2. OnA the sleeve portions there are provided axially extending ribs 5 with faces 6 which taper toward the edges of the sleeves and are .of enlarged radius at their inner ends adjacent to the flange 2.. The sleeve portions 3 and 4 are. also slightly tapered, being of greatest thickness at the point where they join the central flange 2 and gradually decreasing in thickness at the outer ends as clearly shown in Fig. 3. The tapering of the ribs 5 greatly facilitates fitting the coupling to the sections 7 which are to be joined. It is apparent that the sleeve portions 3 and 4 are of considerably smaller diameter than the interior of the tubular pile sections 7. The radial distance from the center of the coupling to the outer surface of the portion of the ribs 5 adjacent to the flange 2 is substantially equal to the radius of the inside of the tubular sections 7. The outer ends or tapered portions of these ribs are naturally on a smaller radius. This permits the coupling to be freely started when assembling adjacent sections.

In operation the coupling may be first inserted by hand a short distance in the end of one pile section and then forcibly driven further until the surface 8 of the flange 2 abuts the upper edge of the tubular section. In practice this is usually donc by means of a steam hammer, the head of which is illustrated at 9 in Fig. 4. The coupling may thus serve also as a driving cap for the tubular section as will be understood. After one section has been driven into the earth a sufficient distance, another section is slipped over the coupling and driven into enga ement with the upper surface 10 of the ange 2, a second. coupling' being in- Serial No. 497,766.

serted iu the upper end ofthe section .7 to serve as a driving cap.

My improved coupling may be made more cheap-ly than vcouplings previously used. lt is also easier to use because it enters the pipe freely and under the driving of the hammer the lower shoulder of the rib or flange 2 is brought into positive contact with the end of the lower pipe and without any tendency to split the pipe. The ribs 5 on the outside of the sleeve, being spaced apart, allow the pipe to draw across the intermediate spaces. so that if the casting is a little rough or not a true circle of exactly the diameter of the inside of the pipe, the latter will draw across approximately in the line of a chord between the ribs. The coupling may be made lighter and cheaper and with less accuracy than is the case with sleeves which have a contact with the pipe around the entire perimeter.

Another advantage of my coupling is its use as a driving cap, being designed of sufficient strength and of suitable proportions to take the blows of the hammer directly. By using it as a driving cap it prevents the curling and destruction of the end of the upper end of the pipe. A positive tight joint is first made by driving the coupling into complete tight contact with the top of the pipe and by then placing a second pipe on the coupling and driving it into positive complete contact with the latter. use it has been shown that there is no tendency for the pipes to over-ride the joint. The pipe is fitted tightly over the ribs of the coupling so that there is no possibility of its jumping and moving laterally off the coupling under the driving blows. The ribs,

besides serving to make a tight fit in the pipe f serve also as reinforcing ribs for the solid portions of the sleeve and the latter are made heavy enough, with the reinforcement from the ribs, to withstand the blows of the hammer.

Though I have described with great particularity in detail an embodiment of my invention. yet it is not to be understood therefrom that the invention is limited to the particular embodiment described. Various modiflcations'thereof in detail and in the arrangement of the parts may be made by those skilled in the art without departing from the invention as defined in the followinV claims.

7Vhat I claim is:

l. A coupling for a pair of tubular pile In actual j sections comprising a member having a transverse flange which abuts tl'ieends of said tubular seetions and formed with opposite axially extending sleeve portions of smaller diameter' than the interior of the tubular sections and having a series of axially extendingtapered ribs on the outside of said sleeve portions arranged to vtrietiona-lly engage the interior of said tubular sections and permit a slight elastic deformation of the ends of the tubular sections Without danger of splitting them.

24A coupling for a pair of tubular pile sections comprising a east sleeve haring an outer transverse flange adapted to ahnt the ends Ot said tubular sections and Continuous axially extending sleeve portions each haring a plurality ot axially extending rihs .formed on the outside thereof, the ends ol said ribs heiner tapered inwardly to permit the Coupling to he wedged. into tight engagement With the Walls ot said tubular sections In Witness whereof, I have hereunto signed my name.

REUBEN DAVIS. 

